Rockwell Automation 160-DN2 160-DN2 DeviceNet Communication Module FRN 3.xx - Manual (Page 18)

Publication 0160-5.18 - June 2003
3-2 Installation and Wiring
EMC Directive 89/336/EEC
Compliance The 160-DN2 Communication Module complies with
Electromagnetic Compatibility (EMC) Directive 89/336/EEC when
conforming to these installation requirements:
• Applying the essential requirements for a conforming EMC
installation for the Bulletin 160 SSC drive. Refer to the Bulletin
160 SSC User Manual.
• Connecting the DeviceNet cable shield to the SSC drive’s
protective earth terminal, PE, with a low impedance connection.
• Installing a clamp-on ferrite cable clamp (see Figure 3.9 ) on the
DeviceNet communication cable within 10 cm (4 in.) of the SSC
drive. When multiple SSC drives are contained in one control
cabinet, it is sufficient to install one clamp-on ferrite cable clamp
where the DeviceNet communication cable enters the control
cabinet.
Low Voltage Directive 73/23/EEC
Compliance The 160-DN2 Communication Module complies with Low Voltage
Directive 73/23/EEC when conforming to these installation
requirements:
• Applying the essential requirements for a conforming Low Voltage
Directive installation for the Bulletin 160 SSC drive. Refer to the
Bulletin 160 SSC User Manual.
• Observing the Safety Precautions on Preface page P-3 , and other
Attention statements throughout this manual when installing the
module.
Surge Suppression Transient EMI can be generated whenever inductive loads such as
relays, solenoids, electro-mechanical brakes, motor starters, or motors
are operated by “hard contacts.” The wiring guidelines contained
herein are based on the assumption that you safeguard your system
against the effects of transient EMI by using surge suppressors to
suppress transient EMI at its source. Inductive loads switched by only
solid-state output devices do not require surge suppression. However,
inductive loads that are in series or parallel with hard contacts require
surge suppression to protect control circuits as well as to suppress
transient EMI.
Even if regularly cycled inductive loads have no interaction with
the control system, these loads need suppression if their
conductors are:
• Connected to the same separately derived system as that of the
control system.
• Routed in proximity with conductors of the control system (per
routing guidelines).
The application (voltage and load of the inductive circuit) dictates the
specific suppressor needed at the source of the inductive load. Testing
has determined that the best overall RC surge suppressor combination